Latte Dock v0.10 Beta - multiple docks and panels on the same edge of the screen

The next three weeks will be spent fixing bugs, and the official stable version v0.10.0 will be released in mid-July

Changelog:

- multiple docks and panels on the same edge of the screen - docks and floating panels
- accepts the background radius and size of the background shadow
- ten different modes of visibility
- OnSemand sidebars
- Plasma Desktop information about panel and dock geometries (from plasma 5.18)
- inform window managers about the visible area of ??the docks (GTK_FRAME_EXTENTS support)
- provided the internal Widget Explorer dialog and so you can be fully used in other desktop environments such as GNOME and XFCE
- supports multiple Latte activities in the same dock or panel
- enhancements in positioning applets for Justify alignment in latte panels
- latte-centered applets that can easily use the parabolic effect
- the user can specify the custom color scheme for each aspect
- redesign and improvement of all dialog boxes
- templates for all layout
- move / copy / paste functionality for docks and panels
- export models and docks / panels as templates for public use
- lots of small bug fixes and improvements